Full Description of event/sighting: We were out walking around our property when the sky was lit up by a very bright object in the eastern sky (up Williams Creek valley) that seemed to be tumbling downwards following an erratic path. The sky seemed somewhat cloudy in that direction so the object was not well defined but it was very bright and lasted about five seconds as it tumbled downwards from SE to NE - as bright as a lightning flash but it was certainly not lightning. The trajectory was not a straight line but more of a tumbling corkscrew.